The resignation of Nepalese PM and former Maoist rebel leader Pushpa Kamal Dahal has thrown the country into renewed turmoil, with tensions rising between former Maoist guerrillas and army chief Rookmangud Katawa.

Less than a year ago, officials were pressing the mines and factories of northern China to shut down or move away to clear the air of dust and smog for the Beijing Olympics. But environmental concerns in China have flagged.